Web Reference: Oct 31, 2024 · Sentinel node biopsy identifies the first few lymph nodes into which a tumor drains. The surgeon uses a harmless dye and a weak radioactive solution to locate the sentinel nodes. The nodes are removed and tested for signs of cancer. Jul 31, 2023 · During the biopsy, your surgeon will use the map created from your mapping procedure to find your sentinel lymph node (s). They will take out your sentinel lymph node (s) and send them to a lab to be checked for cancer cells. What is a sentinel lymph node? A sentinel lymph node is defined as the first lymph node to which cancer cells are most likely to spread from a primary tumor. Sometimes, there can be more than one sentinel lymph node.
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